age = 20
if age >= 18:
  print('pass')
else:
  print('no')

print(list(range(101)))

sum = 0
for x in range(101):
  sum += x
print(sum)

print(1 == '1') 
# == 值比较  is 指针内存地址比较
 
a = 'hello'
type(a) == int #false
isinstance(a, str) #Trueja

# 对象三个特征 id value type  is == isinstance

# 表达式 运算符和操作数构成的序列



print('please input accout')
user_account = input()

print('please input password')
user_password = input()


if True:
  print('hello')
else:
  pass


